The phrase itself is everyday Spanish for 'I didn't say anything bad', and as a short audio clip it works because that denial is instantly recognisable even to listeners who only catch the tone. It circulates as a reaction sound in Spanish-language memes, short videos and chat replies, where it is dropped in the moment someone is accused, teased or caught out. Its staying power comes from that versatility: the same few seconds can sound innocent, cheeky or sarcastic depending on the scene it is placed over.